Disk fan wheel



May 1, 1928. 1,668,462

\ R. w. oswALD DISK FAN WHEEL A Filed May 9, 1924 3 Sheets-Sheet 1 May 1, 1928. 1,668,462

R. w. OSWALD DI SK FAN WHEEL Filed May 9. 1924 s Sheets-Sheet 2 May 1, 1928.

R. w. OSWALD DISK FAN WHEEL Filed May 9. 1924 5 Sheets-Sheet 3 ltl l atentell May 11, rare;

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Application filled Slay 9, EiGFltll lilo." 312,1ltl5,

, lhis invention aimsto provide a simple lln the form shown inli'igure l, the wheel embodies a disk 1 of metal, having radial slits 2 and circumferential slits 3 extending toward each other from the inner ends or the radial slits 2, to form a central huh 8 and arms 9 in the same plane with the hub, the material 5 freed in the formation of the slits 2 and 3 being inclined laterally in opposite directions to form vanes 6 which ,are joined integrally to the opposite edges 3' oil the arms 9.-

in Figures 3 and 4 there appears a disk as 9 having radial slits l0, and single circumferential slit 11 communicating with the inner end of the radial slit it), each slit end forming one edge 12 of an arm l4: which is located in the same plane with the hub 15 of the wheel, the material ll; freed in forms tion of the slits 10 and ll being laterally inclined to form vanes 17 projecting ina common direction, laterally, with respect to the disk, the vanes 17 being joined integrally with those edges 18 of the arms M which are opposite to the edges 12 of the arms.

In Figures 5 and (3, the disk is designated by the numeral 20, the hub by the numeral 21, the arms by the numeral 522, and the OPPOS itely inclined vanes by thenumeral 23.,

' lhe radial slits are shown at 24. This form 1s ainodification' of the form shown in Fig and the modification consists in ioniiture 1,

ting the circumferential slits 3 of Figure l,

the m 25, to

aterial being bulged or distorted, as at replace the slits 3. Figure 7, the disk is marked Toy the numeral 26, the hub appears at 27, the arms at 28, being and the vanes at 29, the radial slits shown at 30. Figure 7 shows a modiiication of the form disclosed in Figure 3,

and the modification consists in bending or distor ting the constituent material of the disk, as at 31, in place of forming the circumferential slits 11 of Figure 3.

I claim In a device of the class described, a disk having radial slits extended inwardly from its riphery, and circumferential slits exe tending away from the inner ends of the radial. slits, to form a centralvhuh and arms in the same plane with the huh, the material and latera freed in the formation of the radial circumferential slits being inclined lly' inopposite directions from said as my own, l have hereto atlined my signanroninan w, osriatn. 

